How low will he go? Even at the behest of President Donald Trump, Attorney General Bill Barr said on Monday that he “doesn’t expect” either to investigate—or to subpoena for testimony— former President Barack Obama or Vice President Joe Biden, according to a report by The Wall Street Journal.

He didn’t directly address remarks made in recent weeks by President Trump and some of his conservative allies that have suggested without evidence that. Obama and Biden—who is the presumptive Democratic presidential nominee and Trump’s expected 2020 opponent—had engaged in criminal acts to spy on his 2016 election campaign.

The issue, he says is that Obama-era officials “unmasked” the former national security adviser—gaining knowledge of his identity—after his call to reassure then-Russian Ambassador Sergey Kislyak that sanctions on his nation would be expunged after Trump took the oath of office in January 2016.

Indeed, on Wednesday, May 13, the White House sent lawmakers a declassified list of Obama-era officials whom Trump and his aides claim requested documents that led to Flynn’s identity being “unmasked” in intelligence reports.